In the Americas With David Yetman

Forty million people rely on water released from Lake Mead, on the Colorado River not far from Las Vegas. That booming city, renowned for vice, is also a world leader in water conservation. Far downstream huge canals de-water the river, as farmers look to technology to maintain their productivity, Californians deliver water to their vast population and farmland, and Mexico receives its entitlement. The once-great river and vast wetlands face a dried-out channel.